Digital Communication Questions and Answers
Q1.
The non coherent FSK needs ____ Eb/N0 than coherent FSK.
Answer :
1db more
Q2.
Channel’s phase response must be a linear function of
Answer :
Frequency
Q3.
The filters used with the equalizer is of _____ types.
Answer :
Feed forward and feedback
Q4.
The likelihood ratio test is done between
Answer :
Likelihood of s1 by likelihood of s2
Q5.
Optimum threshold value is given by
Answer :
a0+a1/2
Q6.
The method in which the tail of one pulse smears into adjacent symbol interval is called as
Answer :
Intersymbol interference
Q7.
The minimum nyquist bandwidth for the rectangular spectrum in raised cosine filter is
Answer :
1/2T
Q8.
The term heterodyning refers to
Answer :
Frequency conversion & mixing
Q9.
The filter which is used to recover the pulse with less ISI is called as
Answer :
Correlator
Q10.
Channels display multi-path due to
Answer :
1. Scattering
2. Time delayed reflections
3. Diffraction
0 Comments